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Service Providers >> Satellite Connection in Africa >> Andrew 7.3m C-band antenna https://www.satsig.net/cgi-bin/yabb/YaBB.pl?num=1430224593 Message started by cornel on Apr 28th, 2015 at 1:36pm |
Title: Andrew 7.3m C-band antenna Post by cornel on Apr 28th, 2015 at 1:36pm
I would like to find out how difficult it is to change the feed on a 7.3m Andrew antenna. The feed is currently linear and I would like to change it to circular.
Can 1 person alone do it? Thanks |
Title: Re: Andrew 7.3m C-band antenna Post by Eric Johnston on Apr 28th, 2015 at 5:48pm
Have a look at the joint flanges where the circular waveguide from the feed horn is connected to the OMT, which splits out the 4 GHz and 6 GHz rectangular waveguides.
How accessible is that joint ? If easily accessible then consider how a polariser tube could be inserted between A and B. Be extremely careful not to bend the long circular tube, even by 1/000 inch. Read more: Circular polarisation set up Your antenna has dual optics (i.e. sub-reflector and main reflector) so the transmit circular polarisation of the feed is the same as the transmit polarisation from the your big dish. Best regards, Eric. |
Title: Re: Andrew 7.3m C-band antenna Post by cornel on Apr 29th, 2015 at 7:41am
Thanks Eric!
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